Hi Jacek,
Some comments below. Please also get an ack from Sylwester! :-)
On Fri, Mar 20, 2015 at 04:03:26PM +0100, Jacek Anaszewski wrote:
> This patch adds support for external v4l2-flash devices.
> The support includes parsing "flashes" DT property
> and asynchronous subdevice registration.
>
> Signed-off-by: Jacek Anaszewski <j.anaszewski@xxxxxxxxxxx>
> Acked-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
> Cc: Sylwester Nawrocki <s.nawrocki@xxxxxxxxxxx>
> ---
> drivers/media/platform/exynos4-is/media-dev.c | 36 +++++++++++++++++++++++--
> drivers/media/platform/exynos4-is/media-dev.h | 13 ++++++++-
> 2 files changed, 46 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/media/platform/exynos4-is/media-dev.c b/drivers/media/platform/exynos4-is/media-dev.c
> index f315ef9..8dd0e5d 100644
> --- a/drivers/media/platform/exynos4-is/media-dev.c
> +++ b/drivers/media/platform/exynos4-is/media-dev.c
> @@ -451,6 +451,25 @@ rpm_put:
> return ret;
> }
>
> +static void fimc_md_register_flash_entities(struct fimc_md *fmd)
> +{
> + struct device_node *parent = fmd->pdev->dev.of_node;
> + struct device_node *np;
> + int i = 0;
> +
> + do {
> + np = of_parse_phandle(parent, "flashes", i);
> + if (np) {
if (!np)
break;
And you can remove checking np another time in the loop condition.
> + fmd->flash[fmd->num_flashes].asd.match_type =
> + V4L2_ASYNC_MATCH_OF;
> + fmd->flash[fmd->num_flashes].asd.match.of.node = np;
> + fmd->num_flashes++;
> + fmd->async_subdevs[fmd->num_sensors + i] =
> + &fmd->flash[i].asd;
Have all the sensors been already registered by this point?
> + }
> + } while (np && (++i < FIMC_MAX_FLASHES));
How about instead:
fmd->num_flashes < FIMC_MAX_FLASHES
And drop i. Also move incrementing num_flashes as last in the if.
> +}
> +
> static int __of_get_csis_id(struct device_node *np)
> {
> u32 reg = 0;
> @@ -1275,6 +1294,15 @@ static int subdev_notifier_bound(struct v4l2_async_notifier *notifier,
> struct fimc_sensor_info *si = NULL;
> int i;
>
> + /* Register flash subdev if detected any */
> + for (i = 0; i < ARRAY_SIZE(fmd->flash); i++) {
> + if (fmd->flash[i].asd.match.of.node == subdev->dev->of_node) {
> + fmd->flash[i].subdev = subdev;
> + fmd->num_flashes++;
> + return 0;
> + }
> + }
> +
> /* Find platform data for this sensor subdev */
> for (i = 0; i < ARRAY_SIZE(fmd->sensor); i++)
> if (fmd->sensor[i].asd.match.of.node == subdev->dev->of_node)
> @@ -1385,6 +1413,8 @@ static int fimc_md_probe(struct platform_device *pdev)
> goto err_m_ent;
> }
>
> + fimc_md_register_flash_entities(fmd);
> +
> mutex_unlock(&fmd->media_dev.graph_mutex);
>
> ret = device_create_file(&pdev->dev, &dev_attr_subdev_conf_mode);
> @@ -1401,12 +1431,14 @@ static int fimc_md_probe(struct platform_device *pdev)
> goto err_attr;
> }
>
> - if (fmd->num_sensors > 0) {
> + if (fmd->num_sensors > 0 || fmd->num_flashes > 0) {
> fmd->subdev_notifier.subdevs = fmd->async_subdevs;
> - fmd->subdev_notifier.num_subdevs = fmd->num_sensors;
> + fmd->subdev_notifier.num_subdevs = fmd->num_sensors +
> + fmd->num_flashes;
> fmd->subdev_notifier.bound = subdev_notifier_bound;
> fmd->subdev_notifier.complete = subdev_notifier_complete;
> fmd->num_sensors = 0;
> + fmd->num_flashes = 0;
>
> ret = v4l2_async_notifier_register(&fmd->v4l2_dev,
> &fmd->subdev_notifier);
> diff --git a/drivers/media/platform/exynos4-is/media-dev.h b/drivers/media/platform/exynos4-is/media-dev.h
> index 0321454..feff9c8 100644
> --- a/drivers/media/platform/exynos4-is/media-dev.h
> +++ b/drivers/media/platform/exynos4-is/media-dev.h
> @@ -34,6 +34,8 @@
>
> #define FIMC_MAX_SENSORS 4
> #define FIMC_MAX_CAMCLKS 2
> +#define FIMC_MAX_FLASHES 2
> +#define FIMC_MAX_ASYNC_SUBDEVS (FIMC_MAX_SENSORS + FIMC_MAX_FLASHES)
> #define DEFAULT_SENSOR_CLK_FREQ 24000000U
>
> /* LCD/ISP Writeback clocks (PIXELASYNCMx) */
> @@ -93,6 +95,11 @@ struct fimc_sensor_info {
> struct fimc_dev *host;
> };
>
> +struct fimc_flash_info {
> + struct v4l2_subdev *subdev;
> + struct v4l2_async_subdev asd;
> +};
> +
> struct cam_clk {
> struct clk_hw hw;
> struct fimc_md *fmd;
> @@ -104,6 +111,8 @@ struct cam_clk {
> * @csis: MIPI CSIS subdevs data
> * @sensor: array of registered sensor subdevs
> * @num_sensors: actual number of registered sensors
> + * @flash: array of registered flash subdevs
> + * @num_flashes: actual number of registered flashes
> * @camclk: external sensor clock information
> * @fimc: array of registered fimc devices
> * @fimc_is: fimc-is data structure
> @@ -123,6 +132,8 @@ struct fimc_md {
> struct fimc_csis_info csis[CSIS_MAX_ENTITIES];
> struct fimc_sensor_info sensor[FIMC_MAX_SENSORS];
> int num_sensors;
> + struct fimc_flash_info flash[FIMC_MAX_FLASHES];
> + int num_flashes;
> struct fimc_camclk_info camclk[FIMC_MAX_CAMCLKS];
> struct clk *wbclk[FIMC_MAX_WBCLKS];
> struct fimc_lite *fimc_lite[FIMC_LITE_MAX_DEVS];
> @@ -149,7 +160,7 @@ struct fimc_md {
> } clk_provider;
>
> struct v4l2_async_notifier subdev_notifier;
> - struct v4l2_async_subdev *async_subdevs[FIMC_MAX_SENSORS];
> + struct v4l2_async_subdev *async_subdevs[FIMC_MAX_ASYNC_SUBDEVS];
>
> bool user_subdev_api;
> spinlock_t slock;
--
Kind regards,
Sakari Ailus
e-mail: sakari.ailus@xxxxxx XMPP: sailus@xxxxxxxxxxxxxx
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